[Bug][TubeMQ] Master start failed with NullPointerException

[lucaspeng12138]

What happened

Master start failed with NullPointerException.

java.lang.NullPointerException: null
at io.prometheus.client.CollectorRegistry.collectorNames(CollectorRegistry.java:119) ~[simpleclient-0.14.1.jar:?]
at io.prometheus.client.CollectorRegistry.register(CollectorRegistry.java:50) ~[simpleclient-0.14.1.jar:?]
at io.prometheus.client.Collector.register(Collector.java:308) ~[simpleclient-0.14.1.jar:?]
at io.prometheus.client.Collector.register(Collector.java:301) ~[simpleclient-0.14.1.jar:?]
at org.apache.inlong.tubemq.server.master.stats.prometheus.MasterPromMetricService.start(MasterPromMetricService.java:52) ~[tubemq-server-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT]
at org.apache.inlong.tubemq.server.master.TMaster.(TMaster.java:219) ~[tubemq-server-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT]
at org.apache.inlong.tubemq.server.tools.MasterStartup.main(MasterStartup.java:44) ~[tubemq-server-1.3.0-SNAPSHOT.jar:1.3.0-SNAPSHOT]

What you expected to happen

Master start normally.

How to reproduce

File: inlong-tubemq/tubemq-server/src/main/java/org/apache/inlong/tubemq/server/master/stats/prometheus/MasterPromMetricService.java
Caused by start() function, register() will use mfs which is returned from collect(). And when tubemq-master start, collect() will return null. Then NullPointerException happens.

Environment

No response

InLong version

master

InLong Component

InLong TubeMQ

Are you willing to submit PR?

• Yes, I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[lucaspeng12138]

@gosonzhang please have a check, thanks.

[gosonzhang]

@lucaspeng12138, thanks!

This is my fault, sorry, I'll deal with it right now!